Fig. 3

The effect of HS7 on the cell viability of MRC-5 normal fetal human lung fibroblasts. a The cell viability of MRC-5 cells was measured after treatment with HS7 for 72 h. b The effect of HS7 on MRC-5 cells was examined by phase-contrast microscopy after 72 h of treatment, scale bar = 100 μm. Cell viability data (mean ± SE) are expressed as a percentage compared to the control and analyzed as described in “Statistical analysis”